Highest temperature in London on June 24?

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Active sub-markets

Market context

The real-world event driving this market is the peak of a severe heatwave currently sweeping the UK, with forecasts indicating temperatures at London City Airport could reach 36°C to 37°C on 24 June 2026, potentially shattering the existing June record of 35.6°C set in 1976[1][2]. This extreme thermal pressure aligns with the current 72% crowd-implied probability for the "YES" outcome, suggesting traders are pricing in a near-certain breach of historical thresholds as the heatwave intensifies toward mid-week[1].

Historical precedents frame this probability as highly credible, given that the UK is already experiencing its hottest June day on record with temperatures surpassing 35°C, and conditions are expected to intensify further toward 40°C by Wednesday or Thursday[2]. Comparable cases from 1976 show that once such a heat dome establishes over southern England, temperatures in Greater London consistently exceed 36°C, making the current market sentiment a rational reflection of established meteorological patterns rather than speculative guesswork[2].

Traders must monitor the Met Office's daily updates on the heatwave's trajectory and the specific timing of the peak temperature at London City Airport, as humidity levels are expected to persist overnight with temperatures unlikely to drop below 17°C to 22°C[2]. Recent reports from Reuters confirm the mercury could reach 39°C by mid-week, a critical dependency that will directly determine the final resolution range[1]. Regarding accessibility, German GlüStV regulations and US CFTC reach create a complex compliance landscape, yet the "no-KYC up to $1,500" threshold allows retail participants to access this market without immediate identity verification, provided the trade value remains within this limit, though this does not constitute legal advice on regulatory obligations.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). The odds column is filled only where we have clean data — that avoids the made-up numbers that get a network demoted when search engines cross-check against the source venue.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

FAQ

Where can I trade this market with the lowest fees?

On Polymarket Legal UK, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

What does it cost to trade on Polymarket Legal UK?

Zero. Polymarket Legal UK routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, Polymarket Legal UK triggers a quick verification flow that finishes in minutes.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.